Adame Levine, singer of US group Maroon 5 performs during the ceremony of European MTV music Awards in Rome, Thursday, Nov. 18, 2004. (AP Photo/Andrew Medichini)

U.S. group Maroon 5 pose after winning the 'Best new act' during the MTV Europe Music Awards in Rome, Thursday, Nov. 18, 2004. MTV said the ceremony will air to a potential worldwide audience of more than 1 billion people. It is the second time that Italy hosts the event, after a ceremony staged in Milan in 1998. (AP Photo/Alessandra Tarantino)

Adam Levine, vocalist and guitarist for Maroon 5, listens to the audience as he and his band performs during radio station Z100's Jingle Ball 2004 at New York's Madison Square Garden, Friday Dec. 10, 2004. The concert, which included a variety of musical performers, was sponsored by Z100 and Teen People magazine. (AP Photo/Tina Fineberg)

** FILE ** The group Maroon 5 pose as they arrive for the VH1 Big in '04 awards, in this Dec. 1, 2004 file photo, in Los Angeles. (AP Photo/Mark J. Terrill, File)

Lead vocalist Adam Levine of the group Maroon 5 accepts their award for best new artist at the 47th Annual Grammy Awards on Sunday, Feb. 13, 2005, at the Staples Center in Los Angeles. (AP Photo/Kevork Djansezian)

Music group Maroon 5 poses at Quixote Studios in West Hollywood, Calif., Jan. 27, 2005. From left are Ryan Dusick, Mickey Madden, Adam Levine, Jesse Carmichael and James Valentine. (AP Photo/Stefano Paltera)

Lead singer for the band Maroon 5, Adam Levine performs at the NFL Kickoff Celebration Thursday, Sept. 8, 2005, at the Coliseum in Los Angeles. (AP Photo/Chris Carlson)

Adam Levine, right, and Mickey Madden of Maroon 5 perform during the band's taped segment at the "ReAct Now: Music & Relief" special at Paramount Studios in Los Angeles, Friday, Sept. 9, 2005. The show, which aired on MTV, CMT and VH1 channels, featured live and taped musical performances from a wide variety of artists across the country to raise funds for victims of Hurricane Katrina. (AP Photo/Chris Pizzello)

The group Maroon 5 appears backstage with the award for best pop performance by a duo or group with vocals for "This Love" at the 48th Annual Grammy Awards on Wednesday, Feb. 8, 2006, at the Staples Center in Los Angeles. (AP Photo/Reed Saxon)

Adam Levine of the group Maroon 5 performs in a musical tribute to BMI Icons recipients Crosby, Stills & Nash during the 54th Annual BMI Pop Awards in Beverly Hills, Calif., Tuesday, May 16, 2006. The awards dinner honored the songwriters and publishers of the most performed pop songs of the past 12 months. (AP Photo/Chris Pizzello)

Adam Levine of Maroon 5 greets fans after performing their new single "Makes Me Wonder," at the 20th Annual Kids' Choice Awards in Los Angeles, on Saturday, March 31, 2007. (AP Photo/Kevork Djansezian)

Band members of Maroon 5, from left, Mickey Madden, Jesse Carmichael, Adam Levine, Matt Flynn and James Valentine pose for a photo at The Whisper Lounge in Los Angeles, Wednesday, May 16, 2007. (AP Photo/Damian Dovarganes

Adam Levine, of Maroon 5, performs with the band at the House of Blues in West Hollywood, Calif. on Monday, July 9, 2007. Before the performance the band announced plans for their upcoming "It Won't Be Soon Before Long" World Tour. (AP Photo/Matt Sayles)

Bassist Mickey Madden, left, and lead singer Adam Levine perform with Maroon 5 on NBC's "Today" television program in New York's Rockefeller Center, Friday Aug. 17, 2007. The band has been nominated for an MTV Video Music Award for best group at the Sept.9 VMAs. (AP Photo/Jason DeCrow)

Maroon 5's Adam Levine performs at a LIFEbeat benefit concert at the House of Blues in the Mandalay Bay hotel & casino in Las Vegas on Saturday, Sept. 8, 2007. (AP Photo/Isaac Brekken)

Maroon 5 arrives at the American Music Awards in Los Angeles on Sunday, Nov. 18, 2007. (AP Photo/Matt Sayles)

Lead singer Adam Levine and Maroon 5 performs during a taped appearance on MTV's "Total Request Live" at MTV Studios, Monday, Jan. 14, 2008 in New York. The program will air on Wednesday. (AP Photo/Evan Agostini)

Maroon 5 arrives to the Breeders' Cup Winners Circle gala event sponsored by Grey Goose, held at the Hollywood Palladium, featuring a live performance by Maroon 5 and music spun by DJ Joel Madden in Los Angeles, CA on October 23, 2008 (Dan Steinberg/AP Images for Breeders' Cup)

Lead vocalist and guitarist of the American rock band Maroon 5 Adam Levine, left, and James Valentine perform at the Singapore Indoor Stadium as part of their tour in support of their album "Hands All Over" on Monday, April 25, 2011 in Singapore. (AP Photo/Wong Maye-E)

Adam Levine, left, and James Valentine, of music group Maroon 5, accept the award for favorite band during the People's Choice Awards on Wednesday, Jan. 11, 2012 in Los Angeles. (AP Photo/Chris Pizzello)

Mike Love of the band Beach Boys and Adam Levine, right, of the band Maroon 5 speak onstage after performing during the 54th annual Grammy Awards on Sunday, Feb. 12, 2012 in Los Angeles. (AP Photo/Matt Sayles)

Maroon 5 front man Adam Levine performs on NBC's "Today" show on Friday, June 29, 2012 in New York. (Photo by Charles Sykes/Invision/AP)

Maroon 5 performs at The New Orleans Jazz & Heritage Festival on Friday May 3, 2013 in New Orleans, Louisiana.(Photo by John Davisson/Invision/AP)

From left, Matt Flynn, Mickey Madden, Adam Levine, James Valentine and PJ Morton, of the musical group Maroon 5, arrive at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)